> I also see no reason the term needs to be the same for different types of works. Music, literature, movies, and computer software are very different so why would we expect that a term that is good for music when it comes to balancing wide distribution vs. author incentive to also be good for literature, moves, and software?

The problem is that attempting to categorize works might be futile. Eg. chiptunes (a form of music) originally were software written for the sound chips. Would they fall under "software" or "music" category?